. >>> president obama makes a personal apology to the more than 3 million americans who have lost their insurance because of the affordable care act. >> i am sorry that they, uh, you know, are finding themselves in this situation based on assurances they got from me. >> insurance policies that fell short of the new healthcare law standards are no longer valid. the president says his administration is looking at a range of options to help people whose insurance has been canceled. >>> well, deadly diseases once nearly wiped out are making a frightening comeback in maryland and across the country. a warning that parents who don't vaccinate their children are putting others at risk. in this wjz health watch, linh bui explores an alarming and controversial trend. >> reporter: measles, mumps, whooping cough. deadly diseases. until recently, virtually eliminated, thanks to vaccines that prevent kids from getting sick. but now doctors see an alarming trend. more and more children are coming down with these diseases. >>it's a serious issue these diseases are coming back? >> very. kids die from m